New England quarterback Tom Brady has undergone two more procedures to clean out infection on his surgically repaired knee, the Boston Herald reported Thursday.

The newspaper said Brady is on a six-week course of intravenous antibiotics and will continue to have follow-up exams at the clinic in Los Angeles where he had the surgery.

Brady confirmed for the first time Saturday that he’d undergone two operations on his injured left knee. The Herald, citing an unnamed source familiar with his treatment, said he’s had two more since then because of infection.

If the infection is not brought under control, the Herald reports, the patellar tendon graft used to replace Brady’s anterior cruciate ligament could become compromised. If that happens, Brady could need to redo the surgery — likely delaying his rehabilitation.

New England Patriots spokesman Stacey James said Wednesday the team would let Brady comment on the status of his injury.